那些遇到过的问题

P/Invoke CryptUnprotectData中断SqlConnection构造函数

Jus*_*nen 6 c# pinvoke sqlconnection securestring

我试图使用CryptUnprotectData读取使用密码保护的CryptProtectData进入SecureString,并用它来连接到数据库.我可以输出正确的密码,但尝试创建新的密码SqlConnection失败后出现以下情况:

System.TypeInitializationException was unhandled
  HResult=-2146233036
  Message=The type initializer for 'System.Data.SqlClient.SqlConnection' threw an exception.
  Source=System.Data
  TypeName=System.Data.SqlClient.SqlConnection
  StackTrace:
       at System.Data.SqlClient.SqlConnection..ctor()
       at System.Data.SqlClient.SqlConnection..ctor(String connectionString, SqlCredential credential)
       at System.Data.SqlClient.SqlConnection..ctor(String connectionString)
       at ProtectedSqlTest.Program.Main() in C:\Git\ProtectedSqlTest\ProtectedSqlTest\Program.cs:line 16
       at System.AppDomain._nExecuteAssembly(RuntimeAssembly assembly, String[] args)
       at System.AppDomain.ExecuteAssembly(String assemblyFile, Evidence assemblySecurity, String[] args)
       at Microsoft.VisualStudio.HostingProcess.HostProc.RunUsersAssembly()
       at System.Threading.ThreadHelper.ThreadStart_Context(Object state)
       at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
       at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
       at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
       at System.Threading.ThreadHelper.ThreadStart()
  InnerException: 
       HResult=-2146233036
       Message=The type initializer for 'System.Data.SqlClient.SqlConnectionFactory' threw an exception.
       Source=System.Data
       TypeName=System.Data.SqlClient.SqlConnectionFactory
       StackTrace:
            at System.Data.SqlClient.SqlConnection..cctor()
       InnerException: 
            HResult=-2146233036
            Message=The type initializer for 'System.Data.SqlClient.SqlPerformanceCounters' threw an exception.
            Source=System.Data
            TypeName=System.Data.SqlClient.SqlPerformanceCounters
            StackTrace:
                 at System.Data.SqlClient.SqlConnectionFactory..cctor()
            InnerException: 
                 HResult=-2147024809
                 Message=The parameter is incorrect. (Exception from HRESULT: 0x80070057 (E_INVALIDARG))
                 Source=mscorlib
                 StackTrace:
                      at System.Globalization.TextInfo.InternalChangeCaseString(IntPtr handle, IntPtr handleOrigin, String localeName, String str, Boolean isToUpper)
                      at System.Globalization.TextInfo.ToLower(String str)
                      at System.String.ToLower(CultureInfo culture)
                      at System.Diagnostics.PerformanceCounterLib.GetPerformanceCounterLib(String machineName, CultureInfo culture)
                      at System.Diagnostics.PerformanceCounterLib.IsCustomCategory(String machine, String category)
                      at System.Diagnostics.PerformanceCounter.InitializeImpl()
                      at System.Diagnostics.PerformanceCounter.set_RawValue(Int64 value)
                      at System.Data.ProviderBase.DbConnectionPoolCounters.Counter..ctor(String categoryName, String instanceName, String counterName, PerformanceCounterType counterType)
                      at System.Data.ProviderBase.DbConnectionPoolCounters..ctor(String categoryName, String categoryHelp)
                      at System.Data.SqlClient.SqlPerformanceCounters..ctor()
                      at System.Data.SqlClient.SqlPerformanceCounters..cctor()
                 InnerException:
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这是不够的,只是打电话CryptUnprotectData的SqlConnection失败,连接本身并不需要使用返回SecureString.

我使用的扩展方法从这里在描述这个岗位对我最小的摄制:

class Program
{
    const string ProtectedSecret = /* SNIP - base 64 encoded protected data here */;
    static void Main()
    {
        // calling AppendProtectedData breaks the following SqlConnection
        // without the following line the application works fine
        new SecureString().AppendProtectedData(Convert.FromBase64String(ProtectedSecret));

        using (var conn = new SqlConnection("Server=(localdb)\\MSSqlLocalDb;Trusted_Connection=true"))
        using (var cmd = new SqlCommand("select 1", conn))
        {
            conn.Open();
            cmd.ExecuteNonQuery();
        }
    }
}
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如果我SqlConnection 在加载密码之前创建一个新的,我可以SqlConnection在应用程序的持续时间内创建新的,因为它似乎使用相同SqlConnectionFactory,但这意味着作为一种解决方法我必须在应用程序的开始做这样的事情:

new SqlConnection().Dispose();
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...我想避免.

以下没有帮助:

  • 调试与发布版本
  • 在Visual Studio中调试vs通过命令行运行
  • 改变CryptProtectFlags传递给CryptUnprotectData.
  • RuntimeHelpers.PrepareConstrainedRegions()从保护方法中删除.

Windows 10,VS Enterprise 2015,控制台应用程序(.NET 4.6.1)

更新:在另一个线程中运行数据保护代码会产生一个具有不同根本原因的类似异常:

System.TypeInitializationException was unhandled
  HResult=-2146233036
  Message=The type initializer for 'System.Data.SqlClient.SqlConnection' threw an exception.
  Source=System.Data
  TypeName=System.Data.SqlClient.SqlConnection
  StackTrace:
       at System.Data.SqlClient.SqlConnection..ctor()
       at System.Data.SqlClient.SqlConnection..ctor(String connectionString, SqlCredential credential)
       at System.Data.SqlClient.SqlConnection..ctor(String connectionString)
       at ProtectedSqlTest.Program.Main() in C:\Git\ProtectedSqlTest\ProtectedSqlTest\Program.cs:line 17
       at System.AppDomain._nExecuteAssembly(RuntimeAssembly assembly, String[] args)
       at System.AppDomain.ExecuteAssembly(String assemblyFile, Evidence assemblySecurity, String[] args)
       at Microsoft.VisualStudio.HostingProcess.HostProc.RunUsersAssembly()
       at System.Threading.ThreadHelper.ThreadStart_Context(Object state)
       at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
       at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
       at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
       at System.Threading.ThreadHelper.ThreadStart()
  InnerException: 
       HResult=-2146233036
       Message=The type initializer for 'System.Data.SqlClient.SqlConnectionFactory' threw an exception.
       Source=System.Data
       TypeName=System.Data.SqlClient.SqlConnectionFactory
       StackTrace:
            at System.Data.SqlClient.SqlConnection..cctor()
       InnerException: 
            HResult=-2146233036
            Message=The type initializer for 'System.Data.SqlClient.SqlPerformanceCounters' threw an exception.
            Source=System.Data
            TypeName=System.Data.SqlClient.SqlPerformanceCounters
            StackTrace:
                 at System.Data.SqlClient.SqlConnectionFactory..cctor()
            InnerException: 
                 BareMessage=Configuration system failed to initialize
                 HResult=-2146232062
                 Line=0
                 Message=Configuration system failed to initialize
                 Source=System.Configuration
                 StackTrace:
                      at System.Configuration.ClientConfigurationSystem.EnsureInit(String configKey)
                      at System.Configuration.ClientConfigurationSystem.PrepareClientConfigSystem(String sectionName)
                      at System.Configuration.ClientConfigurationSystem.System.Configuration.Internal.IInternalConfigSystem.GetSection(String sectionName)
                      at System.Configuration.ConfigurationManager.GetSection(String sectionName)
                      at System.Configuration.PrivilegedConfigurationManager.GetSection(String sectionName)
                      at System.Diagnostics.DiagnosticsConfiguration.Initialize()
                      at System.Diagnostics.DiagnosticsConfiguration.get_SwitchSettings()
                      at System.Diagnostics.Switch.InitializeConfigSettings()
                      at System.Diagnostics.Switch.InitializeWithStatus()
                      at System.Diagnostics.Switch.get_SwitchSetting()
                      at System.Data.ProviderBase.DbConnectionPoolCounters..ctor(String categoryName, String categoryHelp)
                      at System.Data.SqlClient.SqlPerformanceCounters..ctor()
                      at System.Data.SqlClient.SqlPerformanceCounters..cctor()
                 InnerException: 
                      HResult=-2147024809
                      Message=Item has already been added. Key in dictionary: 'MACHINE'  Key being added: 'MACHINE'
                      Source=mscorlib
                      StackTrace:
                           at System.Collections.Hashtable.Insert(Object key, Object nvalue, Boolean add)
                           at System.Collections.Hashtable.Add(Object key, Object value)
                           at System.Configuration.Internal.InternalConfigRoot.GetConfigRecord(String configPath)
                           at System.Configuration.ClientConfigurationSystem.EnsureInit(String configKey)
                      InnerException:
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Ste*_*fer 2

我最近遇到了类似的症状，使用http://www.griffinscs.com/?p=12中的相同代码：任何调用CryptUnprotectData都会导致一些不相关的代码出现异常。有趣的是，该故障仅发生在 Windows 10 机器上；相同的代码在 Windows 7 机器上运行良好。

我通过更改和from toszDataDescr中的参数声明并在两个调用中传递而不是传递来解决了该问题。CryptProtectDataCryptUnprotectDatastringIntPtrIntPtr.Zerostring.Empty

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